Installing the Cisco IOS XRv 9000 Router in KVM Environments
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- Wendy Summers
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1 Installing the Cisco IOS XRv 9000 Router in KVM Environments These file types are needed to install Cisco IOS XRv 9000 Router on the KVM hypervisor:.qcow2 Used for booting the software image in KVM OpenStack environments. The qcow2 disk image has an instance of the Cisco IOS XRv 9000 Router pre-installed..iso and.qcow2 Used to manually create the Cisco IOS XRv 9000 Router VM using Virsh application. You must also have virsh.xml file that has sample XML configuration used to launch the Cisco IOS XRv 9000 Router in KVM environments using Virsh commands. Installation Requirements for KVM, page 1 Installing the Cisco IOS XRv 9000 Router Using KVM Command Line, page 2 Installing the Cisco IOS XRv 9000 Router in KVM Using Virsh, page 5 Creating the Cisco IOS XRv 9000 Router KVM Instance on OpenStack, page 6 Increasing Performance on KVM Configuration, page 9 Installation Requirements for KVM Cisco IOS XRv 9000 Router is supported on top of Ubuntu and Red Hat Distrutions using the Kernel Virtual Machine (KVM). The Cisco IOS XRv 9000 Router installation on KVM requires the creation of a VM and installation using the either.iso file or.qcow2 image. The VM can be launched either using the KVM command line, Virsh, or OpenStack. For information on the installation requirements for KVM, refer to the latest Release s for Cisco IOS XRv 9000 Router. See the Table 1 for release notes links. 1
2 Installing the Cisco IOS XRv 9000 Router Using KVM Command Line Installing the Cisco IOS XRv 9000 Router in KVM Environments From Release 6.0, minimum of 45GB VM hard disk size is supported. The du command is used to check the real amount of disk space consumed by the virtual disk image. The option intel_iommu=on command must be set in the grub configuration for PCIe-passthrough interfaces to work in a VM. The CPU flags must be passed into the VM and must include the sse4_2 flag in order for the embedded Dataplane to work. For information on KVM support on OpenStack, see the section KVM support on OpenStack. Installing the Cisco IOS XRv 9000 Router Using KVM Command Line This procedure provides a general guideline for manually creating the VM for the Cisco IOS XRv 9000 router; the exact steps that you need to perform may vary depending on the characteristics of your KVM environment and setup. For more information, see the Red Hat Linux or Ubuntu documentation. This procedure explains how to create ISO boot configuration with 3 traffic interfaces and 3 required interfaces (one is for XR management, and two are reserved). 2
3 Installing the Cisco IOS XRv 9000 Router in KVM Environments Installing the Cisco IOS XRv 9000 Router Using KVM Command Line 1 /usr/bin/kvm \ Invokes the KVM 2 -smbios type=1,manufacturer="cisco",product="cisco IOS XRv 9000",uuid=97fc351b-431d-4cf2-9c01-43c283faf2a3 \ Sets Universally Unique Identifier (UUID) for the VM instance. The UUID is used as part of licensing to identify VM instance. 3 -cpu host \ 4 Pass host CPU flags into guest. -drive file=/home/username/bnbmay13/workdir-username/disk1.raw,if=virtio,media=disk,index=1 \ -drive file=/home/username/bnbmay13/workdir-username/xrv9k-fullk9-x.iso.baked,media=cdrom,index=2 \ Empties harddisk and boots ISO. 5 -m \ Creates memory. 6 -smp cores=4,threads=1,sockets=1 \ Creates four virtual CPUs and one socket. 7 -enable-kvm \ Enables hardware acceleration. 8 -display none \ Emulates VGA console when using serial ports for console access. This step is recommended. 9 -rtc base=utc \ Sets the real time clock (RTC). -netdev tap,id=host1,ifname=usernamelx1,script=no,downscript=no \ -netdev tap,id=host2,ifname=usernamelx2,script=no,downscript=no \ -netdev tap,id=host3,ifname=usernamelx3,script=no,downscript=no \ -device virtio-net-pci,romfile=,netdev=host1,id=host1,mac=52:46:84:57:a0:da \ -device virtio-net-pci,romfile=,netdev=host2,id=host2,mac=52:46:c4:f4:36:0f \ -device virtio-net-pci,romfile=,netdev=host3,id=host3,mac=52:46:a5:c0:d0:c5 \ Creates 3 NICs; the first is mapped to XR management interface, the second and third are reserved. -netdev tap,id=data1,ifname=usernamexr1,script=no,downscript=no \ -netdev tap,id=data2,ifname=usernamexr2,script=no,downscript=no \ -netdev tap,id=data3,ifname=usernamexr3,script=no,downscript=no \ -device e1000,romfile=,netdev=data1,id=data1,mac=52:46:87:18:62:df \ -device e1000,romfile=,netdev=data2,id=data2,mac=52:46:32:02:90:6f \ -device e1000,romfile=,netdev=data3,id=data3,mac=52:46:34:93:52:1f \ The fourth to eleventh NICs are mapped to traffic ports. A minimum of one traffic interface is recommended. -serial telnet: :10621,nowait,server \ 3
4 Installing the Cisco IOS XRv 9000 Router Using KVM Command Line Installing the Cisco IOS XRv 9000 Router in KVM Environments -serial telnet: :14713,nowait,server \ -serial telnet: :18090,nowait,server \ -serial telnet: :17181,nowait,server \ Creates four serial ports to access console. The first serial port is mapped to XR console. See Console Mapping section for additional information. A minimum of one serial port is recommended. For information on configuring the serial console access, see Configuring the Serial Console Access in KVM using QEMU section. 13 -boot once=d & Boot the ISO only once. Example: /usr/bin/kvm \ -smbios type=1,manufacturer="cisco",product="cisco IOS XRv 9000",uuid=97fc351b-431d-4cf2-9c01-43c283faf2a3 \ -cpu host \ -drive file=/home/username/bnbmay13/workdir-username/disk1.raw,if=virtio,media=disk,index=1 \ -drive file=/home/username/bnbmay13/workdir-username/xrv9k-fullk9-x.iso.baked,media=cdrom,index=2 \ -m \ -smp cores=4,threads=1,sockets=1 \ -enable-kvm \ -daemonize \ -display none \ -rtc base=utc \ -name IOS-XRv-9000:username \ -runas username \ -netdev tap,id=host1,ifname=usernamelx1,script=no,downscript=no \ -netdev tap,id=host2,ifname=usernamelx2,script=no,downscript=no \ -netdev tap,id=host3,ifname=usernamelx3,script=no,downscript=no \ -device virtio-net-pci,romfile=,netdev=host1,id=host1,mac=52:46:84:57:a0:da \ -device virtio-net-pci,romfile=,netdev=host2,id=host2,mac=52:46:c4:f4:36:0f \ -device virtio-net-pci,romfile=,netdev=host3,id=host3,mac=52:46:a5:c0:d0:c5 \ -netdev tap,id=data1,ifname=usernamexr1,script=no,downscript=no \ -netdev tap,id=data2,ifname=usernamexr2,script=no,downscript=no \ -netdev tap,id=data3,ifname=usernamexr3,script=no,downscript=no \ -device e1000,romfile=,netdev=data1,id=data1,mac=52:46:87:18:62:df \ -device e1000,romfile=,netdev=data2,id=data2,mac=52:46:32:02:90:6f \ -device e1000,romfile=,netdev=data3,id=data3,mac=52:46:34:93:52:1f \ -monitor telnet: :11063,server,nowait \ -serial telnet: :10621,nowait,server \ -serial telnet: :14713,nowait,server \ -serial telnet: :18090,nowait,server \ -serial telnet: :17181,nowait,server \ -boot once=d & The disk labeled disk1.raw in the example above can be created with qemu-img. The qemu-img is an utility to convert the virtual hard disk format. Instead of a raw disk format, qcow2 disk format can be used in above example. A preinstalled qcow2 image can also be used; in that case the cdrom parameter is removed. 4
5 Installing the Cisco IOS XRv 9000 Router in KVM Environments Installing the Cisco IOS XRv 9000 Router in KVM Using Virsh Installing the Cisco IOS XRv 9000 Router in KVM Using Virsh This procedure provides a general guideline for manually creating the VM for the Cisco IOS XRv 9000; the exact steps that you need to perform may vary depending on the characteristics of your KVM environment and setup. For more information, refer the Red Hat Linux, Ubuntu and Virsh documentation. Before You Begin The VM memory ballooning is not supported and hence the 'memory' and 'currentmemory' unit values (as shown below) must be the same in Virsh file. <memory unit='mb >XXX</memory> <currentmemory unit='mb >XXX</currentMemory> Step 1 Step 2 From Cisco.com download the.iso or.qcow2 image along with the sample Virsh XML file. Edit the XML file to point to the.iso or.qcow2 image, and edit the interface sources to designate the connectivity desired. <!-- CDROM HDB Disk --> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/home/<username>/xrv9k-fullk9-x.iso'/> <target dev='hdc' bus='ide'/> <alias name='ide-cdrom'/> </disk> Step 3 Step 4 If qcow2 image is used, comment out the CDROM section. If iso image is used, then: 1 Create an empty qcow2 disk: qemu-img create -f qcow2 xrv9000.qcow2 45G The minimum supported VM hard disk size is 45GB for release 6.0 and 55GB for release Edit the HDA Disk section in the XML to point to the empty qcow2 disk just created: <!-- HDA Disk --> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/home/<username>/xrv9000.qcow2'/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> </disk> Step 5 Create the Virsh domain. virsh create xrv9k-fullk9-x.virsh.xml Step 6 Validate the Virsh domain created in Step 5: virsh list xrv9k-fullk9-x.virsh.xml Id Name State
6 Creating the Cisco IOS XRv 9000 Router KVM Instance on OpenStack Installing the Cisco IOS XRv 9000 Router in KVM Environments 149 IOS-XRv-9000_username_virsh running Step 7 Use the Virsh commands to manage the VM, such as: reboot virsh reboot IOS-XRv-9000_USER1_virsh shutdown virsh shutdown IOS-XRv-9000_USER1_virsh destroy virsh destroy IOS-XRv-9000_USER1_virsh For information on configuring the serial console access, see Configuring the Serial Console Access in KVM using Virsh section. See Virsh command reference documentation for more details. Creating the Cisco IOS XRv 9000 Router KVM Instance on OpenStack This procedure shows how to bring the Cisco IOS XRv 9000 Router up on the RHEL 7 and later version and OpenStack 5 and later version. The procedure uses the OpenStack command line interface. It is expected that the reader is familiar with OpenStack commands and procedures. See the OpenStack documentation for further information. At the end of the procedure, you will have a single Cisco IOS XRv 9000 Router running with 3 data plane interfaces connected to 3 neutron networks. In case trunk interfaces are required, please use Neutron ML2 core plugin with Nexus 1kv mechanism plugin. The following procedure creates only Access (non-tagging) type of interfaces. Before You Begin You must have: OpenStack 5, 6 or 7 with Neutron ML2 core plugin, Open vswitch as a mechanism plugin and VLAN as Tenants network type. Cisco IOS XRv 9000 Router ISO image (VGA type). Step 1 Image preparation 6
7 Installing the Cisco IOS XRv 9000 Router in KVM Environments Creating the Cisco IOS XRv 9000 Router KVM Instance on OpenStack For Cisco IOS XRv 9000 Router deployment on OpenStack you need: Cisco IOS XRv 9000 ISO image (VGA type) a blank 45GB cinder volume (virtual hard disk) The minimum supported VM hard disk size is 45GB for release 6.0 and 55GB for release 5.4. When the ISO image is booted, the Cisco XRv 9000 Router gets installed on the second disk (blank 45GB volume). Later, the router can be booted from the created cinder volume. Optionally, a pre-installed Cisco XRv 9000 qcow2 disk can be downloaded in place of the ISO image. 1 Cisco IOS XRv 9000 ISO image (VGA type) must be imported into OpenStack glance. Use the following command line to import the image into glance: glance image-create --name xrv9k-fullk9_vga-x --disk-format iso --container bare \ --file xrv9k-fullk9_vga-x.iso 2 Verify the image in OpenStack glance: glance image-list ID Name Disk Format Container Format Size Status b a8-45e7-abfd-f52593f2dc1a csr1000v-universalk s s qcow2 bare active e779245a bee-bc85-a73e9394b981 xrv9k-fullk9_vga-x iso bare active 3b3ade31-fae fb77452a65ab xrvr-initial-config iso bare active Step 2 Cinder volumes preparation Use the following command line to create Cinder volumes: 1 Create Cinder volume of Cisco IOS XRv 9000 Router's disk image and make it bootable: cinder create --display-name xrv9k-disk 45 cinder set-bootable volume-id True The cinder list command displays the volume ID of router's ISO image. 2 Check Cinder volumes: cinder list ID Status Display Name Size Volume Type Bootable Attached to cbef86dd daa-81b2-4b905b Available xrv9k-disk 45 None true 5262e1fe-37f bf76-aab26cb
8 Creating the Cisco IOS XRv 9000 Router KVM Instance on OpenStack Installing the Cisco IOS XRv 9000 Router in KVM Environments You must see Cinder volume with name xrv9k-disk with Status-Available and Bootable-True. Step 3 Step 4 Configuring Nova Flavor The virtual hardware templates are called flavors in OpenStack. The nova flavor-create command allows users to create new flavors. The nova s flavor is used to pass the information about RAM size, disk, and number of cores to the Nova scheduler process when new instances of VM are launched. The Cisco IOS XRv 9000 Router requires 16GB of RAM, 45GB hard disk, and 4 vcpus. nova flavor-create xrv9k-flavor auto xrv9k-flavor is flavor's name. Configuring network Cisco IOS XRv 9000 Router requires a minimum of 4 network interfaces. The first NIC or vnic is mapped with the XR management interface, the second and third NICs are reserved, and the remaining NICs are mapped to traffic interfaces. For more information on interface mapping, see the Mapping the Router Network Interfaces to VM Network Interface Cards section. For a sample network configuration, we can have 6 neutron networks, 6 neutron subnetworks and then pass 6 network IDs as parameters to VM instance. This equates to 3 traffic interfaces. Use neutron net-create <neutron-network-name> to create networks in Neutron. For example: neutron net-create management-xr neutron net-create management-other neutron net-create management-host neutron net-create datalink-1 neutron net-create datalink-2 neutron net-create datalink-3 In the above example, first three commands create control plane networks, and last three commands create data plane networks. Now using corresponding network names, create subnetworks in Neutron. Use neutron subnet-create <neutron-network-name> <IP-subnet> --name <neutron-network-name> command. For consistency, keep the neutron names and subnetwork names same. For example: neutron subnet-create management-xr /26 --name management-xr neutron subnet-create management-other /26 --name management-other neutron subnet-create management-host /26 --name management-host neutron subnet-create datalink /24 --name datalink-1 neutron subnet-create datalink /24 --name datalink-2 neutron subnet-create datalink /24 --name datalink-3 Step 5 Attach management-xr and management-host subnets to the neutron router Use these commands to attach the management-xr and management-host subnets to the neutron router: neutron router-interface-add <Neutron router name> <subnet id of management-xr> neutron router-interface-add <Neutron router name> <subnet id of management-host> 8
9 Installing the Cisco IOS XRv 9000 Router in KVM Environments Increasing Performance on KVM Configuration This step must be performed before launching the Cisco IOS XRv 9000 Router to avoid DHCP issues. The neutron router-list command displays list of Neutron router name. The neutron subnet-list command displays list of Neutron subnet. Step 6 Launch the Cisco IOS XRv 9000 Router Follow this command line to boot the router. nova boot --flavor xrv9k-flovor \ --nic net-id={control plane network ID of management-xr} \ --nic net-id={control plane network ID of management-other} \ --nic net-id={control plane network ID of management-host} \ --nic net-id={data plane network ID of datalink-1} \ --nic net-id={data plane network ID of datalink-2} \ --nic net-id={data plane network ID of datalink-3} \ --block-device id={glance ID of Cisco IOS XRv 9000 router's CD volume available in Step 1},\ --source=image,dest=volume,bus=ide,device=/dev/hdc,size=1,type=cdrom,bootindex=1 \ --block-device source=volume,id={cinder ID of Cisco IOS XRv 9000 Router's disk volume available in Step 1}, dest=volume,size=50,bootindex=0 xrv9k-1 nova list (your instance should be in Active state) nova get-vnc-console xrv9k-1 novnc The nova get-vnc-console command returns an URL that is used to access the Cisco IOS XRv 9000 Router console. The config-drive allows the VM to boot with an initial configuration so that when the VM is powered on, it can perform services, configured in the config-drive. As the Cisco IOS XRv 9000 Router is running on the VM, the router accepts a valid XR configuration through a plain text file. During the boot process the text file is parsed by the command parser, just as if the commands were entered through CLI. If config-drive support is desired, a plaintext file with the initial XR configuration can be passed by adding this line under nova boot command: config-drive true user-data <path>/iosxr_config.txt file /iosxr_config.txt=<path>/iosxr_config.txt For information on Cisco Virtual Appliance Configuration (CVAC), see section CVAC - Bootstrap Configuration Support. Increasing Performance on KVM Configuration You can increase the performance for a Cisco IOS XRv 9000 Router in the KVM environment by changing settings on the KVM host. These settings are independent of the Cisco IOS XR configuration settings on the router. This option is available in Red Hat Enterprise Linux 7.0 KVM. You can improve performance on KVM configurations by enabling CPU pinning. 9
10 Increasing Performance on KVM Configuration Installing the Cisco IOS XRv 9000 Router in KVM Environments The Cisco IOS XR Software Release 5.4 does not support jumbo packets larger than 1518 bytes for KVM on a VirtIO interface. The packets larger than 1518 bytes are dropped. Enabling CPU Pinning To increase the performance of the Cisco IOS XRv 9000 Router in KVM environments, you can use the KVM CPU affinity option to assign a VM to a specific processor. To use this option, configure CPU pinning on the KVM host. Follow these steps to configure CPU pinning: 1 In the KVM host environment, verify the host topology to find out how many vcpus are available for pinning: virsh nodeinfo 2 Verify the available vcpu numbers: virsh capabilities 3 Pin the vcpus to sets of processor cores: virsh vcpupin <vm-name> <vcpu-number> <host-core-number> The virsh vcpupin command must be executed for each vcpu on your Cisco IOS XRv 9000 Router. The following example shows the KVM commands needed if you have a Cisco IOS XRv 9000 Router configuration with four vcpus and the host has eight cores: virsh vcpupin xrv virsh vcpupin xrv virsh vcpupin xrv virsh vcpupin xrv The host core number can be any number from 0 to 7. For more information, see the KVM documentation. When configuring CPU pinning, carefully consider the CPU topology of the host server. If using a Cisco IOS XRv 9000 Router configured with multiple cores, do not configure CPU pinning across multiple sockets. The downside of improving performance on KVM configuration is that it requires dedicated system resources. 10
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First Published: 2015-08-26 Last Modified: 2018-03-28 Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387)
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